stealc | c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3

Analysis

max time kernel
128s
max time network
130s
platform
windows11-21h2_x64
resource
win11-20240426-en
resource tags

arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
submitted
08-05-2024 06:48

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General

Target

c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe
Size

367KB
MD5

f09b93a6acda058847e36ab92946902f
SHA1

75fad2559f5cd43359a34791c85e480634d3916d
SHA256

c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3
SHA512

abc4e98a411f9a5190ef1dd82238e7af1c7b15df8a91dfb471203f11e6aa6181ca6c7f07c1ac1bb6bc6581bc8a09dbad64d7e89ecb9a30258fd70d718c0a5f9e
SSDEEP

6144:Jfvea1snS42x5pK0JcR4DypPotYhIiMuiEIMmH8d/zKXT8g8:Bvea1snS425K0JcRhuNiMEO8pe8g8

Score

10^/10

stealc zgrat discovery rat stealer

Malware Config

Extracted

Family

stealc

http://185.172.128.150

Attributes

url_path
/c698e1bc8a2f5e6d.php

Signatures

Detect ZGRat V1 3 IoCs

resource	yara_rule
behavioral2/memory/2236-66-0x0000022550AB0000-0x00000225542E4000-memory.dmp	family_zgrat_v1
behavioral2/memory/2236-71-0x000002256EA40000-0x000002256EA64000-memory.dmp	family_zgrat_v1
behavioral2/memory/2236-67-0x000002256EAE0000-0x000002256EBEA000-memory.dmp	family_zgrat_v1

Stealc
Stealc is an infostealer written in C++.
stealer stealc
ZGRat
ZGRat is remote access trojan written in C#.
rat zgrat
Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
1156	u35w.0.exe
4916	u35w.1.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Program crash 2 IoCs

pid	pid_target	Process	procid_target
4476	4100	WerFault.exe	78
4840	1156	WerFault.exe	81

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u35w.1.exe
Key queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u35w.1.exe
Key enumerated	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI	u35w.1.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	u35w.0.exe
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	u35w.0.exe

Suspicious behavior: EnumeratesProcesses 21 IoCs

pid	Process
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
1156	u35w.0.exe
1156	u35w.0.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2236	SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe

Suspicious use of FindShellTrayWindow 7 IoCs

pid	Process
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe

Suspicious use of SendNotifyMessage 7 IoCs

pid	Process
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe
4916	u35w.1.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4100 wrote to memory of 1156	4100	c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe	81
PID 4100 wrote to memory of 1156	4100	c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe	81
PID 4100 wrote to memory of 1156	4100	c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe	81
PID 4100 wrote to memory of 4916	4100	c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe	84
PID 4100 wrote to memory of 4916	4100	c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe	84
PID 4100 wrote to memory of 4916	4100	c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe	84
PID 4916 wrote to memory of 2236	4916	u35w.1.exe	89
PID 4916 wrote to memory of 2236	4916	u35w.1.exe	89

C:\Users\Admin\AppData\Local\Temp\c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe
"C:\Users\Admin\AppData\Local\Temp\c6412c0af961d867d36b3b4c328722ce8069de0d9a9372a02dc50dbdbd45b0e3.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:4100
- C:\Users\Admin\AppData\Local\Temp\u35w.0.exe
  "C:\Users\Admin\AppData\Local\Temp\u35w.0.exe"
  2⤵
  - Executes dropped EXE
  - Checks processor information in registry
  - Suspicious behavior: EnumeratesProcesses
  PID:1156
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1156 -s 1244
    3⤵
    - Program crash
    PID:4840
- C:\Users\Admin\AppData\Local\Temp\u35w.1.exe
  "C:\Users\Admin\AppData\Local\Temp\u35w.1.exe"
  2⤵
  - Executes dropped EXE
  - Checks SCSI registry key(s)
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of WriteProcessMemory
  PID:4916
- - C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe
    "C:\Users\Admin\AppData\Local\Temp\iolo\dm\SystemMechanic_5488CB36-BE62-4606-B07B-2EE938868BD1.exe" /eieci=11A12794-499E-4FA0-A281-A9A9AA8B2685 /eipi=5488CB36-BE62-4606-B07B-2EE938868BD1
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2236
- C:\Windows\SysWOW64\WerFault.exe
  C:\Windows\SysWOW64\WerFault.exe -u -p 4100 -s 1160
  2⤵
  - Program crash
  PID:4476

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4100 -ip 4100
1⤵
PID:4160

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 1156 -ip 1156
1⤵
PID:2152

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\u35w.0.exe

Filesize
226KB

MD5
6891c527d4d65692716c149981e770ff

SHA1
ac4ba0be44795c437f860d710bdd0e3157d17caf

SHA256
b37a558c37740094e51a1b04fa05280e3f28b2592f5881d96ae5f5a05e2c5902

SHA512
1195f321c53df745aec5350e606293507f89e8f3dce3b1c58244f6a6eb9de5cdacdc222960663f7b3e03be69804bbbf8905764c2d1a21dc745e21edba9112e15

Download Submit
C:\Users\Admin\AppData\Local\Temp\u35w.1.exe

Filesize
4.6MB

MD5
397926927bca55be4a77839b1c44de6e

SHA1
e10f3434ef3021c399dbba047832f02b3c898dbd

SHA256
4f07e1095cc915b2d46eb149d1c3be14f3f4b4bd2742517265947fd23bdca5a7

SHA512
cf54136b977fc8af7e8746d78676d0d464362a8cfa2213e392487003b5034562ee802e6911760b98a847bddd36ad664f32d849af84d7e208d4648bd97a2fa954

Download Submit
memory/1156-97-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1156-104-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1156-102-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1156-13-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1156-14-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1156-15-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/1156-100-0x0000000000400000-0x0000000001A03000-memory.dmp

Filesize
22.0MB

Download
memory/2236-88-0x0000022573BD0000-0x0000022573C32000-memory.dmp

Filesize
392KB

Download
memory/2236-81-0x000002256EEC0000-0x000002256F1C0000-memory.dmp

Filesize
3.0MB

Download
memory/2236-95-0x0000022573990000-0x00000225739AE000-memory.dmp

Filesize
120KB

Download
memory/2236-66-0x0000022550AB0000-0x00000225542E4000-memory.dmp

Filesize
56.2MB

Download
memory/2236-68-0x0000022556060000-0x0000022556070000-memory.dmp

Filesize
64KB

Download
memory/2236-70-0x0000022556190000-0x00000225561A4000-memory.dmp

Filesize
80KB

Download
memory/2236-71-0x000002256EA40000-0x000002256EA64000-memory.dmp

Filesize
144KB

Download
memory/2236-69-0x00000225561A0000-0x00000225561AC000-memory.dmp

Filesize
48KB

Download
memory/2236-67-0x000002256EAE0000-0x000002256EBEA000-memory.dmp

Filesize
1.0MB

Download
memory/2236-74-0x000002256ED70000-0x000002256EE22000-memory.dmp

Filesize
712KB

Download
memory/2236-75-0x000002256EE70000-0x000002256EEC0000-memory.dmp

Filesize
320KB

Download
memory/2236-73-0x000002256ED40000-0x000002256ED6A000-memory.dmp

Filesize
168KB

Download
memory/2236-72-0x000002256EA70000-0x000002256EA7A000-memory.dmp

Filesize
40KB

Download
memory/2236-76-0x000002256EE20000-0x000002256EE42000-memory.dmp

Filesize
136KB

Download
memory/2236-77-0x0000022556170000-0x000002255617A000-memory.dmp

Filesize
40KB

Download
memory/2236-94-0x0000022573A30000-0x0000022573AA6000-memory.dmp

Filesize
472KB

Download
memory/2236-83-0x0000022573900000-0x0000022573908000-memory.dmp

Filesize
32KB

Download
memory/2236-85-0x0000022573210000-0x000002257321E000-memory.dmp

Filesize
56KB

Download
memory/2236-86-0x0000022573230000-0x0000022573238000-memory.dmp

Filesize
32KB

Download
memory/2236-84-0x0000022573240000-0x0000022573278000-memory.dmp

Filesize
224KB

Download
memory/2236-89-0x0000022573930000-0x0000022573952000-memory.dmp

Filesize
136KB

Download
memory/2236-93-0x0000022573950000-0x000002257395C000-memory.dmp

Filesize
48KB

Download
memory/2236-87-0x0000022573BB0000-0x0000022573BBA000-memory.dmp

Filesize
40KB

Download
memory/2236-90-0x0000022574160000-0x0000022574688000-memory.dmp

Filesize
5.2MB

Download
memory/4100-1-0x0000000001CB0000-0x0000000001DB0000-memory.dmp

Filesize
1024KB

Download
memory/4100-30-0x0000000000400000-0x0000000001A26000-memory.dmp

Filesize
22.1MB

Download
memory/4100-31-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4100-2-0x0000000003790000-0x00000000037FC000-memory.dmp

Filesize
432KB

Download
memory/4100-3-0x0000000000400000-0x000000000046F000-memory.dmp

Filesize
444KB

Download
memory/4916-52-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download
memory/4916-65-0x0000000000400000-0x00000000008AD000-memory.dmp

Filesize
4.7MB

Download